TWI852675B - Airflow guiding mechanism and electronic device - Google Patents

Abstract

An airflow guiding mechanism includes a casing and an airflow guiding member. The airflow guiding member is rotatably disposed in the casing. The airflow guiding member is able to rotate between a first position and a second position. When the airflow guiding member is located at the first position, the airflow guiding member separates two airflow passages at opposite sides of the airflow guiding member from each other. When the airflow guiding member is located at the second position, the two airflow passages communicate with each other.

Description

Airflow guiding mechanism and electronic device

The present invention relates to an airflow guiding mechanism, in particular to an airflow guiding mechanism that can effectively improve airflow noise and an electronic device equipped with the airflow guiding mechanism.

With the development and progress of technology, various electronic devices (such as computers, servers, etc.) have gradually become indispensable necessities in people's daily lives. Generally speaking, electronic devices are equipped with hard drives and fans for cooling the hard drives. However, the airflow noise generated by the fan will affect the read and write performance of the hard drive, causing the performance of the hard drive to decline.

The present invention provides an airflow guiding mechanism that can effectively improve airflow noise and an electronic device equipped with the airflow guiding mechanism to solve the above-mentioned problems.

According to one embodiment, the airflow guide mechanism of the present invention includes a housing and an airflow guide. The airflow guide is rotatably disposed in the housing. The airflow guide can rotate between a first position and a second position. When the airflow guide is in the first position, the airflow guide separates two airflow channels on its two sides. When the airflow guide is in the second position, the two airflow channels are connected.

According to another embodiment, the electronic device of the present invention includes an electronic unit, two airflow generating units and an airflow guiding mechanism. The two airflow generating units are arranged relative to the electronic unit. The airflow guiding mechanism is arranged between the electronic unit and the two airflow generating units. The airflow guiding mechanism includes a housing and an airflow guiding member. The airflow guiding member is rotatably arranged in the housing. The airflow guiding member can rotate between a first position and a second position. When the airflow guiding member is in the first position, the airflow guiding member separates the two airflow channels on its two sides. When the airflow guiding member is in the second position, the two airflow channels are connected. Each airflow channel corresponds to one of the two airflow generating units.

In summary, the present invention is to set an airflow guide in the housing of the airflow guide mechanism, wherein the airflow guide can rotate between a first position and a second position. When the airflow generating units are operating normally, the airflow generated by the airflow generating units will flow through the two sides of the airflow guide evenly, so that the airflow guide is maintained in the first position without rotating. When the airflow guide is in the first position, the airflow guide separates the two airflow channels on its two sides. At this time, the airflow generated by the airflow generating unit will be separated by the airflow guide, thereby avoiding the mutual influence of the airflow noise generated by the airflow generating unit. In this way, the effect of rectification and noise reduction can be achieved to avoid the performance of the electronic unit being affected by the airflow noise and declining. In addition, when one of the airflow generating units operates abnormally, the airflow generated by the airflow generating unit will deviate to one side of the airflow guide. At this time, the airflow guide will rotate from the first position to the second position as the airflow generated by the airflow generating unit changes. When the airflow guide is in the second position, the two airflow channels are connected, so that the airflow generated by the normally operating airflow generating unit can flow through the two airflow channels to dissipate heat for the electronic unit. In this way, it is possible to avoid a significant reduction in heat dissipation efficiency due to abnormal operation of the airflow generating unit.

The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the attached drawings.

1: Electronic devices

10: Electronic unit

12a~12f: airflow generating unit

14,34: Airflow guiding mechanism

140,340: Shell

142,342: Airflow guide

144:Porous structure

1400,3400: Top plate

1402,3402: Base plate

1404,3404: Side panels

1406: hinge structure

1408,3406: Stop structure

1420,3420: Rotation axis

1422,3422:First leaf

1424,3424: Second leaf

1426: The third leaf

1426a: Surface

1426b: plane

3426: Cam structure

AF: Flow direction

L1~L7: Length

P1, P2: air flow channel

S1: Windward side

S2: Air outlet side

θ: angle of intersection

Figure 1 is a three-dimensional diagram of the interior of an electronic device according to an embodiment of the present invention.

Figure 2 is a top view of the electronic device in Figure 1.

Figure 3 is a three-dimensional diagram of the airflow guide mechanism in Figure 1.

Figure 4 is a three-dimensional view of the airflow guide in Figure 3.

Figure 5 is a three-dimensional diagram of the airflow guide in Figure 3 rotating from the first position to the second position.

Figure 6 is a top view of the airflow guide and stop structure in Figure 5.

Figure 7 is a top view of the airflow guide and the stop structure according to another embodiment of the present invention.

Figure 8 is a three-dimensional diagram of an airflow guiding mechanism according to another embodiment of the present invention.

Figure 9 is a three-dimensional view of the airflow guide in Figure 8.

Figure 10 is a top view of the airflow guide mechanism in Figure 8.

Figure 11 is a top view of the airflow guide in Figure 10 rotating from the first position to the second position.

Please refer to Figures 1 to 6. Figure 1 is a three-dimensional view of the interior of an electronic device 1 according to an embodiment of the present invention. Figure 2 is a top view of the electronic device 1 in Figure 1. Figure 3 is a three-dimensional view of the airflow guide mechanism 14 in Figure 1. Figure 4 is a three-dimensional view of the airflow guide 142 in Figure 3. Figure 5 is a three-dimensional view of the airflow guide 142 in Figure 3 rotating from the first position to the second position. Figure 6 is a top view of the airflow guide 142 and the stop structure 1408 in Figure 5.

As shown in FIG. 1 , the electronic device 1 includes an electronic unit 10, two airflow generating units 12a, 12b, and an airflow guiding mechanism 14. The two airflow generating units 12a, 12b are arranged relative to the electronic unit 10, and the airflow guiding mechanism 14 is arranged between the electronic unit 10 and the two airflow generating units 12a, 12b. The airflow generating units 12a, 12b are used to generate airflow to dissipate heat of the electronic unit 10. The airflow guiding mechanism 14 is used to improve the airflow noise generated by the airflow generating units 12a, 12b to prevent the performance of the electronic unit 10 from being affected by the airflow noise and being reduced. The electronic device 1 can be a computer, a server or other electronic device, depending on the actual application. Generally speaking, the electronic device 1 is also provided with necessary hardware and software components for operation, such as a processor, a memory, a power supply, an application, a communication module, etc., depending on the actual application. In this embodiment, the electronic unit 10 may be a hard disk, and the airflow generating units 12a and 12b may be fans, but are not limited thereto.

It should be noted that the number of electronic units and airflow generating units can be determined according to actual applications and is not limited to the embodiments shown in the figure. Further, the number of electronic units can be one or more, and the number of airflow generating units can be at least two. For example, as shown in Figures 1 and 2, the electronic device 1 can include four electronic units 10 and six airflow generating units 12a~12f, wherein the two airflow generating units 12a and 12b mentioned above are two of the six airflow generating units 12a~12f.

As shown in FIG. 2 and FIG. 3, the airflow guide mechanism 14 includes a housing 140 and an airflow guide 142. The airflow guide 142 is rotatably disposed in the housing 140, so that the airflow guide 142 can rotate between a first position (as shown in FIG. 3) and a second position (as shown in FIG. 5). It should be noted that the number of airflow guides can be determined according to actual applications and is not limited to the embodiments shown in the figures. Further, the number of airflow guides can be one or more. For example, as shown in FIG. 2 and FIG. 3, the airflow guide mechanism 14 can include five airflow guides 142, wherein each airflow guide 142 is located between two of the six airflow generating units 12a~12f.

As shown in FIG. 3 and FIG. 4 , the airflow guide 142 includes a rotating shaft 1420, a first blade 1422, a second blade 1424, and two third blades 1426. The rotating shaft 1420 is pivotally connected to the housing 140 and is substantially parallel to the flow direction AF of the airflow generated by the airflow generating units 12a and 12b. In this embodiment, the housing 140 may define an air inlet side S1 and an air outlet side S2, wherein the air inlet side S1 is opposite to the air outlet side S2. The airflow generated by the airflow generating units 12a and 12b may flow from the air inlet side S1 toward the air outlet side S2, and therefore, the flow direction AF of the airflow is the direction from the air inlet side S1 toward the air outlet side S2. In this embodiment, the housing 140 may include a top plate 1400, a bottom plate 1402, and two side plates 1404, wherein the two side plates 1404 connect the top plate 1400 and the bottom plate 1402, so that the housing 140 is square. In addition, corresponding to each airflow guide 142, the air inlet side S1 and the air outlet side S2 of the housing 140 may further include two hinge structures 1406, and the two hinge structures 1406 are connected to the top plate 1400 and the bottom plate 1402. In this embodiment, each hinge structure 1406 may be a column with a hinge hole. The two ends of the rotating shaft 1420 are pivoted to the two pivot structures 1406, so that the airflow guide 142 can be rotatably disposed in the housing 140. When the rotating shaft 1420 is pivoted to the two pivot structures 1406, the rotating shaft 1420 is substantially parallel to the top plate 1400 and the bottom plate 1402. It should be noted that the above definition of "substantially parallel" includes the situation where the rotating shaft 1420 is slightly skewed.

As shown in FIG. 4 , the first blade 1422 and the second blade 1424 are connected to opposite sides of the rotating shaft 1420, and the two third blades 1426 are also connected to opposite sides of the rotating shaft 1420, so that the airflow guide 142 is in a cross shape. In this embodiment, the length L3 of the two third blades 1426 in the radial direction of the rotating shaft 1420 is smaller than the length L1 and L2 of the first blade 1422 and the second blade 1424 in the radial direction of the rotating shaft 1420. In addition, the length L4 of the first blade 1422 in the axial direction of the rotating shaft 1420 is smaller than the length L5 of the second blade 1424 in the axial direction of the rotating shaft 1420, and the mass of the first blade 1422 is smaller than the mass of the second blade 1424. Therefore, the overall center of gravity of the airflow guide 142 will be lower than the axis of the rotating shaft 1420. In a natural state without external force, the airflow guide 142 will maintain the first position shown in Figure 3. It should be noted that the present invention can also change the mass of the first blade 1422 and the second blade 1424 by changing the material of the first blade 1422 and the second blade 1424, so that the overall center of gravity of the airflow guide 142 is lower than the axis of the rotating shaft 1420.

In this embodiment, each third blade 1426 has a curved surface 1426a and a flat surface 1426b, wherein the curved surface 1426a faces the direction of the first blade 1422, and the flat surface 1426b faces the direction of the second blade 1424. When the air flows through each third blade 1426, the pressure below the flat surface 1426b will be higher than the pressure above the curved surface 1426a. At this time, the pressure difference will generate a lifting force on the third blade 1426. It should be noted that the structure and size of the third blade 1426 can be designed according to the principles of fluid mechanics, so that a pressure difference is generated on both sides of the third blade 1426, and is not limited to the structure and size of this embodiment, which will not be elaborated here.

The following is a description of the technical features of the present invention using two airflow generating units 12a, 12b and the corresponding airflow guide 142. When the two airflow generating units 12a, 12b are operating normally, the airflow generated by the two airflow generating units 12a, 12b will flow evenly through the two sides of the airflow guide 142. At this time, the torques caused by the lifting force on the two third blades 1426 will offset each other, so that the airflow guide 142 remains in the first position shown in FIG. 3 without rotating. When the airflow guide 142 is in the first position shown in FIG. 3, the first blade 1422 and the second blade 1424 of the airflow guide 142 will separate the two airflow channels P1, P2 on its two sides, wherein each airflow channel P1, P2 corresponds to one of the two airflow generating units 12a, 12b. At this time, the airflows generated by the two airflow generating units 12a and 12b will be separated by the airflow guide 142, thereby avoiding the mutual influence of the airflow noise generated by the two airflow generating units 12a and 12b. In this way, the effect of rectification and noise reduction can be achieved to prevent the performance of the electronic unit 10 from being affected by the airflow noise and being reduced.

In addition, when one of the two airflow generating units 12a and 12b operates abnormally, the airflow generated by the two airflow generating units 12a and 12b will deviate to one side of the airflow guide 142. For example, when the airflow generating unit 12a operates abnormally, the airflow will deviate to the right side of the airflow guide 142 shown in FIG. 3. At this time, the moment of force caused by the lifting force on the third blade 1426 on the right side cannot be balanced, so that the airflow guide 142 rotates counterclockwise to the second position shown in FIG. 5. When the airflow guide 142 is in the second position shown in FIG. 5, the two airflow channels P1 and P2 are connected through the two third blades 1426, so that the airflow generated by the normally operating airflow generating unit 12b can flow through the two airflow channels P1 and P2 to dissipate heat for the electronic unit 10. In this way, it is possible to avoid a significant reduction in heat dissipation efficiency due to abnormal operation of the airflow generating unit 12a. Similarly, when the airflow deviates to the left side of the airflow guide 142 shown in FIG. 3, the airflow guide 142 will rotate clockwise to another second position opposite to the second position shown in FIG. 5, so that the two airflow channels P1 and P2 are connected through the two third blades 1426.

As shown in FIG. 5 and FIG. 6, the housing 140 may have a stop structure 1408, wherein the stop structure 1408 may be located at the pivot point between the rotating shaft 1420 and the pivot structure 1406. When the airflow guide 142 is located at the second position shown in FIG. 5 and FIG. 6, the stop structure 1408 stops the second blade 1424 to limit the rotation of the airflow guide 142. Since the length L4 of the first blade 1422 in the axial direction of the rotating shaft 1420 is less than the length L5 of the second blade 1424 in the axial direction of the rotating shaft 1420, the first blade 1422 will not hit the stop structure 1408 during the rotation process.

In this embodiment, a plurality of airflow guides 142 are disposed in the housing 140. When one airflow guide 142 rotates to the second position due to airflow changes, the other airflow guides 142 will also rotate to the second position due to airflow changes (as shown in FIG. 5 ), so that the airflow is more evenly distributed to all electronic units 10.

As shown in FIG. 1 and FIG. 2, the airflow guide mechanism 14 may further include a porous structure 144, which is disposed on the air inlet side S1 of the housing 140 and between the electronic unit 10 and the housing 140. The porous structure 144 is used to stabilize the airflow flowing into the housing 140 to prevent the airflow guide 142 from rotating due to the unstable airflow. In this embodiment, the porous structure 144 may be a honeycomb filter or other structure that can stabilize the airflow, depending on the actual application. In another embodiment, the porous structure 144 may also be omitted.

Please refer to Figure 7, which is a top view of the airflow guide 142 and the stop structure 1408 according to another embodiment of the present invention. As shown in Figure 7, through appropriate structural design, the stop structure 1408 can also be located at the end corresponding to the second blade 1424. When the airflow guide 142 is located at the second position shown in Figure 7, the stop structure 1408 will stop the second blade 1424 to limit the rotation of the airflow guide 142.

Please refer to Figures 8 to 11. Figure 8 is a three-dimensional view of the airflow guide mechanism 34 according to another embodiment of the present invention. Figure 9 is a three-dimensional view of the airflow guide member 342 in Figure 8. Figure 10 is a top view of the airflow guide mechanism 34 in Figure 8. Figure 11 is a top view of the airflow guide member 342 in Figure 10 rotating from the first position to the second position.

As shown in FIG. 8 , the airflow guide mechanism 34 includes a housing 340 and an airflow guide 342. The airflow guide 342 is rotatably disposed in the housing 340, so that the airflow guide 342 can rotate between a first position (as shown in FIG. 10 ) and a second position (as shown in FIG. 11 ). The airflow guide mechanism 14 in FIG. 1 can be replaced by the airflow guide mechanism 34 in FIG. 8 , and the porous structure 144 can also be disposed on the air inlet side S1 of the housing 340 of the airflow guide mechanism 34. It should be noted that the number of airflow guides can be determined according to actual applications and is not limited to the embodiments shown in the figures. Furthermore, the number of airflow guides can be one or more. For example, as shown in FIG. 8 , the airflow guide mechanism 34 may include five airflow guides 342 .

As shown in FIG. 8 and FIG. 9 , the airflow guide 342 includes a rotating shaft 3420, a first blade 3422, and two second blades 3424. In the present embodiment, each second blade 3424 is a solid plate with a uniform surface, that is, the surface of each second blade 3424 has no concave-convex structure or holes. The rotating shaft 3420 is pivotally connected to the housing 340 and is substantially perpendicular to the flow direction AF of the airflow generated by the airflow generating units 12a and 12b. In the present embodiment, the housing 340 can define an air inlet side S1 and an air outlet side S2, wherein the air inlet side S1 is opposite to the air outlet side S2. The first blade 3422 faces the air inlet side S1 of the housing 340, and the second blades 3424 face the air outlet side S2 of the housing 340. The airflow generated by the airflow generating units 12a and 12b can flow from the air inlet side S1 to the air outlet side S2, and thus, the airflow flow direction AF is the direction from the air inlet side S1 to the air outlet side S2. In this embodiment, the housing 340 may include a top plate 3400, a bottom plate 3402, and two side plates 3404, wherein the two side plates 3404 connect the top plate 3400 and the bottom plate 3402, so that the housing 340 is square. The two ends of the rotating shaft 3420 can be pivoted to the top plate 3400 and the bottom plate 3402, so that the airflow guide 342 can be rotatably arranged in the housing 340. When the rotating shaft 3420 is pivoted to the top plate 3400 and the bottom plate 3402, the rotating shaft 3420 is substantially perpendicular to the top plate 3400 and the bottom plate 3402. It should be noted that the above definition of "substantially perpendicular" includes the situation where the rotating shaft 3420 is slightly tilted.

As shown in FIG. 9 , the first blade 3422 and the two second blades 3424 extend from the rotating shaft 3420, wherein the two second blades 3424 are symmetrically located on two sides of one end of the first blade 3422. Therefore, the rotating shaft 3420 is located between the first blade 3422 and the two second blades 3424. In addition, the widths of the first blade 3422 and the two second blades 3424 gradually decrease in a direction away from the rotating shaft 3420. In this embodiment, the first blade 3422 and the two second blades 3424 can be integrally formed into a fan blade structure, so that the fan blade structure can be directly mounted on the rotating shaft 3420. In another embodiment, the first blade 3422 and the two second blades 3424 can also be independent components, depending on the actual application. In this embodiment, the length L6 of the second blades 3424 in the radial direction of the rotation axis 3420 is less than the length L7 of the first blade 3422 in the radial direction of the rotation axis 3420. In this embodiment, the angle θ between each second blade 3424 and the first blade 3422 is greater than 90 degrees, but not limited thereto. The angle θ between each second blade 3424 and the first blade 3422 can be designed according to the principles of fluid mechanics, which will not be elaborated here.

The following is a description of the technical features of the present invention using two airflow generating units 12a, 12b (as shown in FIG. 1) and the corresponding airflow guide 342 (as shown in FIG. 10 and FIG. 11). When the two airflow generating units 12a, 12b are operating normally, the airflow generated by the two airflow generating units 12a, 12b will flow evenly through the two sides of the airflow guide 342. At this time, the torques caused by the airflow thrust on the two second blades 3424 will offset each other, so that the airflow guide 342 is maintained in the first position shown in FIG. 10 and does not rotate. When the airflow guide 342 is located at the first position shown in FIG. 10, the first blade 3422 and the second blades 3424 of the airflow guide 342 will separate the two airflow channels P1 and P2 on both sides thereof, wherein each airflow channel P1 and P2 corresponds to one of the two airflow generating units 12a and 12b. At this time, the airflow generated by the two airflow generating units 12a and 12b will be separated by the airflow guide 342, thereby avoiding the mutual influence of the airflow noise generated by the two airflow generating units 12a and 12b. In this way, the effect of rectifying and reducing noise can be achieved, so as to avoid the performance of the electronic unit 10 (as shown in FIG. 1) being affected by the airflow noise and reduced.

In addition, when one of the two airflow generating units 12a and 12b operates abnormally, the airflow generated by the two airflow generating units 12a and 12b will deviate to one side of the airflow guide 342. For example, when the airflow generating unit 12a operates abnormally, the airflow will deviate to the right side of the airflow guide 342 shown in Figure 10. At this time, the torque caused by the airflow thrust on the second blade 3424 on the right side cannot be balanced, so that the airflow guide 342 rotates counterclockwise to the second position shown in Figure 11. When the airflow guide 342 is located in the second position shown in Figure 11, the first blade 3422 and the second blades 3424 are deflected, so that the two airflow channels P1 and P2 are connected. At this time, the airflow generated by the normally operating airflow generating unit 12b can flow through the two airflow channels P1 and P2 to dissipate heat for the electronic unit 10. In this way, the heat dissipation efficiency can be prevented from being greatly reduced due to the abnormal operation of the airflow generating unit 12a. Similarly, when the airflow deviates to the left side of the airflow guide 342 shown in Figure 10, the airflow guide 342 will rotate clockwise to another second position opposite to the second position shown in Figure 11, so that the two airflow channels P1 and P2 are connected.

As shown in FIGS. 8 to 11, one end of the rotating shaft 3420 may have a cam structure 3426, and the housing 340 may have a stop structure 3406. In this embodiment, the cam structure 3426 and the stop structure 3406 are located on one side of the top plate 3400. In another embodiment, the cam structure 3426 and the stop structure 3406 may also be located on one side of the bottom plate 3402. In addition, the stop structure 3406 may include two opposite protrusions, and the cam structure 3426 is disposed between the two protrusions. When the airflow guide 342 is located in the second position shown in FIG. 11, the stop structure 3406 stops the cam structure 3426 to limit the rotation of the airflow guide 342.

In this embodiment, a plurality of airflow guides 342 are disposed in the housing 340. When one airflow guide 342 rotates to the second position due to airflow changes, the other airflow guides 342 will also rotate to the second position due to airflow changes (as shown in FIG. 11 ), so that the airflow is more evenly distributed to all electronic units 10.

In summary, the present invention is to set an airflow guide in the housing of the airflow guide mechanism, wherein the airflow guide can rotate between a first position and a second position. When the airflow generating units are operating normally, the airflow generated by the airflow generating units will flow through the two sides of the airflow guide evenly, so that the airflow guide is maintained in the first position without rotating. When the airflow guide is in the first position, the airflow guide separates the two airflow channels on its two sides. At this time, the airflow generated by the airflow generating unit will be separated by the airflow guide, thereby avoiding the mutual influence of the airflow noise generated by the airflow generating unit. In this way, the effect of rectification and noise reduction can be achieved to avoid the performance of the electronic unit being affected by the airflow noise and declining. In addition, when one of the airflow generating units operates abnormally, the airflow generated by the airflow generating unit will deviate to one side of the airflow guide. At this time, the airflow guide will rotate from the first position to the second position as the airflow generated by the airflow generating unit changes. When the airflow guide is in the second position, the two airflow channels are connected, so that the airflow generated by the normally operating airflow generating unit can flow through the two airflow channels to dissipate heat for the electronic unit. In this way, it is possible to avoid a significant reduction in heat dissipation efficiency due to abnormal operation of the airflow generating unit.

The above is only the preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

34: Airflow guiding mechanism

340: Shell

342: Airflow guide

3406: Stop structure

3420: Rotating axis

3422: First leaf

3424: Second leaf

3426: Cam structure

P1, P2: air flow channel

Claims (16)

An airflow guide mechanism comprises: a housing; and an airflow guide rotatably disposed in the housing, the airflow guide can rotate between a first position and a second position, the airflow guide comprises a rotating shaft, a first blade and two second blades, the rotating shaft is pivoted to the housing, the first blade and the two second blades extend from the rotating shaft, the first blade faces an air inlet side of the housing, and the two second blades face an air outlet side of the housing; wherein, when the airflow guide is located at the first position, the first blade and the two second blades separate two airflow channels on two sides of the airflow guide; when the airflow guide is located at the second position, the first blade and the two second blades deflect, so that the two airflow channels are connected. The airflow guiding mechanism as described in claim 1, wherein the two second blades are symmetrically located on two sides of one end of the first blade, and the length of the two second blades in the radial direction of the rotating shaft is smaller than the length of the first blade in the radial direction of the rotating shaft. The airflow guiding mechanism as described in claim 1, wherein the first blade and the two second blades are integrally formed into a fan blade structure, and the fan blade structure is sleeved on the rotating shaft. The airflow guide mechanism as described in claim 1, wherein one end of the rotating shaft has a cam structure, and the housing has a stop structure; when the airflow guide is in the second position, the stop structure stops the cam structure to limit the rotation of the airflow guide. The airflow guiding mechanism as described in claim 1, wherein each of the second blades is a solid plate with a uniform surface. The airflow guiding mechanism as described in claim 1, wherein the rotating shaft is located between the first blade and the two second blades. The airflow guiding mechanism as described in claim 1, wherein the width of the first blade and the two second blades gradually decreases in the direction away from the rotating shaft. The airflow guiding mechanism as described in claim 1 further comprises a multi-porous structure disposed on the air inlet side of the housing. An electronic device includes: an electronic unit; two airflow generating units, which are arranged relative to the electronic unit; and an airflow guiding mechanism, which is arranged between the electronic unit and the two airflow generating units, wherein the airflow guiding mechanism includes: a housing; and an airflow guiding member, which is rotatably arranged in the housing, and the airflow guiding member can rotate between a first position and a second position, and the airflow guiding member includes a rotating shaft, a first blade, and two second blades, wherein the rotating shaft is pivotally connected to the housing, and the first blade is arranged between the first blade and the second blade. The first blade and the two second blades extend from the rotating shaft, the first blade faces an air inlet side of the housing, and the two second blades face an air outlet side of the housing; wherein, when the airflow guide is located at the first position, the first blade and the two second blades separate the two airflow channels on the two sides of the airflow guide; when the airflow guide is located at the second position, the first blade and the two second blades deflect, so that the two airflow channels are connected; each of the airflow channels corresponds to one of the two airflow generating units. An electronic device as described in claim 9, wherein the two second blades are symmetrically located on two sides of one end of the first blade, and the length of the two second blades in the radial direction of the rotation axis is smaller than the length of the first blade in the radial direction of the rotation axis. The electronic device as described in claim 9, wherein the first blade and the two second blades are integrally formed into a fan blade structure, and the fan blade structure is sleeved on the rotating shaft. An electronic device as described in claim 9, wherein one end of the rotating shaft has a cam structure, and the housing has a stop structure; when the airflow guide is in the second position, the stop structure stops the cam structure to limit the rotation of the airflow guide. An electronic device as described in claim 9, wherein each of the second blades is a solid plate with a uniform surface. An electronic device as described in claim 9, wherein the rotation axis is located between the first blade and the two second blades. An electronic device as described in claim 9, wherein the widths of the first blade and the two second blades gradually decrease in a direction away from the rotation axis. The electronic device as described in claim 9, wherein the airflow guiding mechanism further comprises a multi-porous structure disposed on the air inlet side of the housing and located between the electronic unit and the housing.

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